diff --git a/src/DataAccess/SmartThermo.DataAccess.Sqlite/Context.cs b/src/DataAccess/SmartThermo.DataAccess.Sqlite/Context.cs
index e41acf3..325e581 100644
--- a/src/DataAccess/SmartThermo.DataAccess.Sqlite/Context.cs
+++ b/src/DataAccess/SmartThermo.DataAccess.Sqlite/Context.cs
@@ -1,5 +1,7 @@
 using Microsoft.EntityFrameworkCore;
 using SmartThermo.DataAccess.Sqlite.Models;
+using System;
+using System.Collections.Generic;
 
 namespace SmartThermo.DataAccess.Sqlite
 {
@@ -11,6 +13,28 @@ public class Context : DbContext
 
         public DbSet<SensorInformation> SensorInformations { get; set; }
 
+        public DbSet<Setting> Settings { get; set; }
+
+        public DbSet<SelectMode> SelectModes { get; set; }
+
+        protected override void OnModelCreating(ModelBuilder modelBuilder)
+        {
+            modelBuilder.Entity<Setting>().HasData(new Setting
+            {
+                Id = 1,
+            });
+
+            modelBuilder.Entity<SelectMode>().HasData(new SelectMode[]
+            {
+                new SelectMode { Id = 1, SettingId = 1, Stage = false },
+                new SelectMode { Id = 2, SettingId = 1, Stage = false },
+                new SelectMode { Id = 3, SettingId = 1, Stage = false },
+                new SelectMode { Id = 4, SettingId = 1, Stage = false },
+                new SelectMode { Id = 5, SettingId = 1, Stage = false },
+                new SelectMode { Id = 6, SettingId = 1, Stage = false }
+            });
+        }
+
         protected override void OnConfiguring(DbContextOptionsBuilder options)
             => options.UseSqlite(@"Data Source=app.db");
     }
diff --git a/src/DataAccess/SmartThermo.DataAccess.Sqlite/Models/SelectMode.cs b/src/DataAccess/SmartThermo.DataAccess.Sqlite/Models/SelectMode.cs
new file mode 100644
index 0000000..939fa93
--- /dev/null
+++ b/src/DataAccess/SmartThermo.DataAccess.Sqlite/Models/SelectMode.cs
@@ -0,0 +1,13 @@
+namespace SmartThermo.DataAccess.Sqlite.Models
+{
+    public class SelectMode
+    {
+        public int Id { get; set; }
+
+        public bool Stage { get; set; }
+
+        public int SettingId { get; set; }
+
+        public Setting Setting { get; set; }
+    }
+}
diff --git a/src/DataAccess/SmartThermo.DataAccess.Sqlite/Models/Setting.cs b/src/DataAccess/SmartThermo.DataAccess.Sqlite/Models/Setting.cs
new file mode 100644
index 0000000..fa5db2c
--- /dev/null
+++ b/src/DataAccess/SmartThermo.DataAccess.Sqlite/Models/Setting.cs
@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+
+namespace SmartThermo.DataAccess.Sqlite.Models
+{
+    public class Setting
+    {
+        public int Id { get; set; }
+
+        public List<SelectMode> SelectModes { get; set; }
+    }
+}
diff --git a/src/Modules/SmartThermo.Modules.DataViewer/ViewModels/Represent/LoadDataViewerWindowViewModel.cs b/src/Modules/SmartThermo.Modules.DataViewer/ViewModels/Represent/LoadDataViewerWindowViewModel.cs
index 141c3c9..a98b335 100644
--- a/src/Modules/SmartThermo.Modules.DataViewer/ViewModels/Represent/LoadDataViewerWindowViewModel.cs
+++ b/src/Modules/SmartThermo.Modules.DataViewer/ViewModels/Represent/LoadDataViewerWindowViewModel.cs
@@ -151,6 +151,13 @@ public LoadDataViewerWindowViewModel(IDeviceConnector deviceConnector, INotifica
 
                     SelectMode[(int)i - 1] = !SelectMode[(int)i - 1];
                     RaisePropertyChanged(nameof(SelectMode));
+
+                    using var context = new Context();
+                    var selectMode = context.SelectModes
+                        .Where(x => x.Id == i)
+                        .FirstOrDefault();
+                    selectMode.Stage = _selectMode[(int)i - 1];
+                    context.SaveChanges();
                 });
         }
 
@@ -251,12 +258,13 @@ private void InitCharts()
             ChartValues.AddRange(Enumerable.Range(0, 36)
                 .Select(x => new ChartValues<MeasureData>())
                 .ToList());
+            Temperature.AddRange(Enumerable.Range(0,36)
+                .Select(x => 0)
+                .ToList());
             LimitRelayItems.AddRange(Enumerable.Range(0, 6)
                 .Select(x => new LimitRelay())
                 .ToList());
-            SelectMode.AddRange(Enumerable.Range(0, 6)
-                .Select(x => false)
-                .ToList());
+            GetSelectMode();
 
             XFormatter = value => new DateTime((long)value).ToString("mm:ss");
             YFormatter = value => Math.Round(value, 1).ToString(CultureInfo.InvariantCulture);
@@ -267,6 +275,12 @@ private void InitCharts()
             SetRelayLimits();
         }
 
+        private void GetSelectMode()
+        {
+            using var context = new Context();
+            SelectMode.AddRange(context.SelectModes.Select(x => x.Stage).ToList());
+        }
+
         private void SetRelayLimits()
         {
             var data = _deviceConnector.SettingDevice;
diff --git a/src/Modules/SmartThermo.Modules.DataViewer/Views/Charts/CustomersTooltip.xaml b/src/Modules/SmartThermo.Modules.DataViewer/Views/Charts/CustomersTooltip.xaml
new file mode 100644
index 0000000..9f3d4df
--- /dev/null
+++ b/src/Modules/SmartThermo.Modules.DataViewer/Views/Charts/CustomersTooltip.xaml
@@ -0,0 +1,64 @@
+<UserControl
+    x:Class="SmartThermo.Modules.DataViewer.Views.Charts.CustomersTooltip"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:charts="clr-namespace:SmartThermo.Modules.DataViewer.Views.Charts"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:wpf="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf"
+    Padding="8"
+    d:DataContext="{d:DesignInstance charts:CustomersTooltip}"
+    d:DesignHeight="450"
+    d:DesignWidth="800"
+    Background="#E4555555"
+    BorderBrush="#555555"
+    BorderThickness="2"
+    mc:Ignorable="d">
+
+    <StackPanel>
+        <TextBlock
+            HorizontalAlignment="Center"
+            Style="{DynamicResource BodyTextBlockStyle}"
+            Text="{Binding Data.Points[0].ChartPoint.Instance.DateTime, StringFormat=HH:mm:ss}" />
+
+        <Separator Margin="0,8" />
+        <ItemsControl
+            HorizontalAlignment="Center"
+            Grid.IsSharedSizeScope="True"
+            ItemsSource="{Binding Data.Points}">
+
+            <ItemsControl.ItemTemplate>
+                <DataTemplate DataType="{x:Type wpf:DataPointViewModel}">
+                    <Grid>
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="Auto" />
+                            <ColumnDefinition Width="Auto" SharedSizeGroup="Title" />
+                            <ColumnDefinition Width="Auto" SharedSizeGroup="Value" />
+                            <ColumnDefinition Width="Auto" SharedSizeGroup="Percent" />
+                        </Grid.ColumnDefinitions>
+                        <Ellipse
+                            Grid.Column="0"
+                            Width="10"
+                            Height="10"
+                            Fill="{Binding Series.Stroke}"
+                            Stroke="{Binding Series.Stroke}" />
+                        <TextBlock
+                            Grid.Column="1"
+                            Margin="4,0,0,0"
+                            VerticalAlignment="Center"
+                            Foreground="White"
+                            Style="{DynamicResource CaptionTextBlockStyle}"
+                            Text="{Binding Series.Title}" />
+                        <TextBlock
+                            Grid.Column="2"
+                            Margin="8,0,0,0"
+                            VerticalAlignment="Center"
+                            Foreground="White"
+                            Style="{DynamicResource CaptionTextBlockStyle}"
+                            Text="{Binding ChartPoint.Instance.Value, StringFormat={}{0}°C}" />
+                    </Grid>
+                </DataTemplate>
+            </ItemsControl.ItemTemplate>
+        </ItemsControl>
+    </StackPanel>
+</UserControl>
diff --git a/src/Modules/SmartThermo.Modules.DataViewer/Views/Charts/CustomersTooltip.xaml.cs b/src/Modules/SmartThermo.Modules.DataViewer/Views/Charts/CustomersTooltip.xaml.cs
new file mode 100644
index 0000000..9e44565
--- /dev/null
+++ b/src/Modules/SmartThermo.Modules.DataViewer/Views/Charts/CustomersTooltip.xaml.cs
@@ -0,0 +1,40 @@
+using LiveCharts;
+using LiveCharts.Wpf;
+using System.ComponentModel;
+
+namespace SmartThermo.Modules.DataViewer.Views.Charts
+{
+    /// <summary>
+    /// Interaction logic for CustomersTooltip.xaml
+    /// </summary>
+    public partial class CustomersTooltip : IChartTooltip
+    {
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        private TooltipData _data;
+
+        public CustomersTooltip()
+        {
+            InitializeComponent();
+            DataContext = this;
+        }
+
+        public TooltipData Data
+        {
+            get { return _data; }
+            set
+            {
+                _data = value;
+                OnPropertyChanged("Data");
+            }
+        }
+
+        public TooltipSelectionMode? SelectionMode { get; set; }
+
+        protected virtual void OnPropertyChanged(string propertyName = null)
+        {
+            if (PropertyChanged != null)
+                PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}
diff --git a/src/Modules/SmartThermo.Modules.DataViewer/Views/Represent/LoadDataViewerWindow.xaml b/src/Modules/SmartThermo.Modules.DataViewer/Views/Represent/LoadDataViewerWindow.xaml
index d03ecb0..b99e5a3 100644
--- a/src/Modules/SmartThermo.Modules.DataViewer/Views/Represent/LoadDataViewerWindow.xaml
+++ b/src/Modules/SmartThermo.Modules.DataViewer/Views/Represent/LoadDataViewerWindow.xaml
@@ -3,7 +3,7 @@
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-    xmlns:local="clr-namespace:SmartThermo.Modules.DataViewer.Views.Represent"
+    xmlns:local="clr-namespace:SmartThermo.Modules.DataViewer.Views.Charts"
     xmlns:lvc="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:prism="http://prismlibrary.com/"
@@ -145,7 +145,7 @@
                         </Style>
                     </lvc:CartesianChart.Style>
                     <lvc:CartesianChart.DataTooltip>
-                        <lvc:DefaultTooltip Background="{DynamicResource SystemControlPageBackgroundChromeMediumLowBrush}" />
+                        <local:CustomersTooltip />
                     </lvc:CartesianChart.DataTooltip>
                 </lvc:CartesianChart>
             </Grid>